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Method of stabilizing mixtures of nitrates and nitrites of molten alkali
Method of stabilizing mixtures of nitrates and nitrites of molten alkali
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机译:稳定熔融碱金属硝酸盐和亚硝酸盐混合物的方法
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摘要
The present invention relates to a process for stabilizing a mixture of molten alkali metal nitrates and alkali metal nitrites usable particularly as a heat transfer fluid and to the stabilized mixture thus obtained. The process comprises adding to the mixture a quantity of alkali metal hydroxide such that the value of the logarithm of the ratio P(H2O)/¦OH-¦2 (where P(H2O) denotes the partial pressure of water vapor expressed in atmospheres and ¦OH-¦ the hydroxide ion concentration expressed in moles/kg) is between a value b corresponding to the disproportionation of the nitrites into nitrate and nitric oxide and a value a corresponding to the appearance of peroxides, the values a and b being determined for a given nitrate/nitrite ratio, a given temperature and given partial pressures of the gases blanketing the mixture.
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